Overview of Changes from GLib 2.5.6 to GLib 2.5.7
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* Optimize g_utf8_validate() [Owen Taylor, Matthias Clasen]
* Optimize g_markup_parse_context_parse() [Havoc Pennington, 
  Morten Welinder]
* Reduce signal connection complexity from O(n) to O(1) 
  [Sven Neumann]
* Add a .pc file for using gmodule in libraries [Owen]
* Add G_GNUC_MALLOC to mark functions returning newly 
  allocated memory  [Matthias]
* Win32 bug fixes [Hans Breuer, Tor Lillqvist, Robert Ögren,
  Bruce Hochstetler]
* Bug fixes [Kazuki IWAMOTO, Matthias, Manish Singh, Morten,
  Frederic Crozat, Tor]
* Documentation improvements [Matthias, Tor, Owen]
* New and updated translations (cs,da,de,en_CA,en_GB,es,nb,nl,sq,zh_CN)